Bushing remover



Mar. 13, 1923.v

L. H. PITZER. BUSHINGIREIVIOVER.

FILED SEPT. 22, 1921.

Patented Mar. l, i923.

arrasar @arent ortica.

LESLIE HOPPER PITZER, 0F GARDEN CITY, KANSAS.

BUSEING REMOVER.

Application led September To all whom t may concern.'

Be it known that I, LESLIE H. PITZER, a citizen of the United States,residing at Garden City, in the county of Finney, State of Kansas, haveinvented a new and useful Bushing Remover; and I do herebydeclare thefollowing to be a full, clear, and exact descriptionv of the invention,such as will enable others skilled in the art to which it appertains tomalre and use the same.

The invention relates to bushing removers and has for its object toprovide a device of this character particularly adapted for punchingbushings from pistons of internal combustion engines in such a mannerthat strain will not be placed on the piston.

A further object is to provide a bushing remover for pistons, saidbushing remover comprising a vertically movable punching member,detachable punching elements adapted to be attached to the lower end ofthe punching element and removable bushings carried by a horizontallydisposed arm and in axial alignment with the punching element andforming the female member of the punch intol which the bushing is forcedas it is removed and also forming means for engaging the inner side ofthe piston adj acent the bushing for preventing the bending strain onthe piston as a whole during a bushing removing operation.

With the above and other objects in view the invention resides in thecombination and arrangement of 4parts as hereinafter set forth, shown inthe drawings, described and claimed, it being understood that changes inthe precise embodiment of the invention may be made within the scope ofwhat is claimed without departing from the spirit of the invention.

In the drawings:

Figure 1 is a side elevation of the bushing removing press, showing aportion of the piston supporting arm which supports the piston, said armbeing broken away to show the bushing receiving recess therein.

Figure 2 is an enlarged detail vertical sectional view through ayportion of the piston supporting arm and the punching carrying member,showing a bushing being removed from a piston.

Figure 3 is a top plan view of the flanged bushing disposed in therecess of the piston supporting arm.

Referring to the drawing, the numeral 1 designates a vertically disposedframe,

22, 1921. Serial No. 502,433.

which frame is provided with a base 2, which may rest on the ground orany suitable support and spaced horizontally disposed arms 3 and 4.Vertically movable in a bearing 5 of the arm 3 is a rack bar 6, withwhich rack bar a pinion 7 meshes, and when rotated through the medium ofthe handle 8 moves the rack bar 6 up or down according to the directionof rotation of the pinion 7. The lower end of the rack bar 6 is providedwith a chamber 9, which chamberreceives a reduced portion 10 of a punchmember 11, said punch member being held in the chamber 9 by means of aset screw 12 which is threaded into the lower end of the rack bar 6 andinto engagement with the reduced portion 10. The punching member 11 isprovided with an annular flange 13,which flange engages the outerperiphery 14 of a piston 15 during a punching operation and limits thedownward movement of the punching element 11. rl`he lower end of thepunching member 11 is provided with a reduced portion 16, therebyforming a portion adapted to engage within the chamber 17 of the pistonbushing 18, and also forming a shoulder 19 which engages the upper endof the piston bushing 18 for forcing said bushing from the wrist pinbushing aperture 20, which aperture extends through the wall of thepiston 15 and through the boss 21 which extends inwardly from the innerside of the piston. Disposed within a recess 22 in the arm 4 of theframe 1 is a flanged bushing 23, the flange 24 of which rests upon theupper side 25 of the arm 4 and forms means for engaging the boss 21 ofthe piston in such a manner that no strain will be placed on the pistonas a whole and only pressure or strain applied to the piston adjacentthe bushing receiving aperture 20, by the engagement of the flange 24with the boss 21. lt is to be understood that diierent sized punchingelements 11 may be utilized according to the type and size of piston andbushing and that different sized flanged bushings 23 may be utilizedaccording to the size and type of punching element 11 used.

From the above it will be seen that a bushing-punch is provided forlremoving bushings from pistons in such a manner that no strain will beplaced on the piston as a whole which is a common diiiculty at thepresent time and therefore bending or forcing the piston out of shape isobviated. The device may be utilized for placing or replacing bushingsas well as. removing bushings, and it is to be understood ythat althoughthe device has been described as a bushing remover, that it is equallyapplicable to both purposes.

The invention having been set forth what is claimed as new and useful isz- 1. A bushing punch for, punching bushings from internal combustionengine pistons5's'aid punch comprisinga frame, horizontallydisposed'arins carried by said ralne and spaced from each other, one oicsaid arms Forming a piston support and adapted to be received within achamber of thev piston, a ilanged bushing,` disposed in said pistonsupporting arm and adapted to lengage the inner side of a pistonadjacent a piston bushing, a vertically movable rack and pinion operatedpunching bar disposed above the piston supporting` arm and vinaxialialignlent with the flanged bushing, said punching` bar having itslower end provided with a punchingelenient vadapted to enter Within the'outer endof a pist-on bushing and a shoulder carried by said punchingelement and adapted to engage the outer end of the pistonbushing in sucha Inannei that as the punchinga bar is'forced downwardly, the pistonbushing; will be `lorced into' the ianged bushing carried b vthe's'upporting arm.

2. A.' piston bushing removing punch,l said able Handed bushin'wjcarried in `alrecess of said supporting arr'n and 'having its angeengaging the outer face o--the arln,A4 'said fiange being` adapted toengagethe boss-of a; piston adjacent the bushing,therennapiinehybar.axially aligned with said langed ing biishuw andI detachable Apuiichingelement carried by said pinechintgv bar and-adaptedto engage the outerendofthepiston bushing for forcing said bushing` from its place in thepiston 'and into the angfedbushingn ln' testimony whereof Ll havesignedniy 'naine to this specification inthe presence of twosuiiscribing Witnesses.

merlin iiorrna Vilitnesses: Y v J. l). VVHITEHEAD, lMoGENE Brr'rmnn.

